Chemical flooding separate injection well one-way flow control device

Abstract

The utility model discloses a chemical flooding separate injection well one-way flow control device, which belongs to the technical field of oil field surface engineering, and comprises an adjusting rod, a pressing cap and a main body outer sleeve, the pressing cap is in threaded connection with the main body outer sleeve, the adjusting rod extends into the pressing cap and enters the main body outer sleeve, and the main body outer sleeve is in threaded connection with the pressing cap. An adjusting rod is arranged in the main body outer sleeve, an adjusting blocking piece is arranged below the adjusting rod, a connecting rod is fixedly arranged below the adjusting blocking piece, a plurality of adjusting pieces are connected below the connecting rod, a one-way valve is arranged in the main body outer sleeve and comprises a valve seat and a one-way valve plate, and the valve seat is annularly distributed in the main body outer sleeve. One end of the one-way valve plate is connected to one end of the valve seat, a seal is arranged at the other end of the one-way valve plate, and the semicircular diameter of the seal is equal to the diameter of the connecting rod. By means of the structure, the problems that ground environment pollution accidents are caused due to the fact that stratum liquid is spit back into a shaft, and underground equipment is corroded and blocked are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil field surface engineering, in particular to a one-way flow control device for a chemical flooding injection well. Background Art

[0002] Chemical flooding and injection wells are a crucial component of tertiary oil recovery (TERR) technology in oilfields. Their operating principle involves a complex downhole chemical displacement process. Precise control of the chemical injection rate is crucial to ensure optimal displacement. However, in practice, chemical flooding and injection wells often face the problem of formation fluid backflow into the wellbore, which not only affects the displacement effect but can also damage downhole equipment.

[0003] Therefore, it is particularly important to develop a one-way flow control device for chemical flooding injection wells. Utility Model Content

[0004] The utility model aims to provide a one-way flow control device for chemical flooding injection wells, which solves the problems of ground environmental pollution accidents, downhole equipment corrosion and blockage caused by formation liquid regurgitation into the wellbore.

[0005] To achieve the above-mentioned purpose, the utility model provides a one-way flow control device for a chemical drive injection well, comprising an adjusting rod, a pressure cap and a main body jacket, wherein the pressure cap is threadedly connected to the main body jacket, the adjusting rod extends into the pressure cap and into the main body jacket, an adjusting baffle is provided below the adjusting rod, a connecting rod is fixedly provided below the adjusting baffle, a number of adjusting parts are connected below the connecting rod, a one-way valve is provided in the main body jacket, and a liquid inlet is threadedly connected below the main body jacket.

[0006] Preferably, a sealing ring is provided between the pressure cap and the main body outer shell, and a gasket is provided between the main body outer shell and the liquid inlet.

[0007] Preferably, the one-way valve includes a valve seat and a one-way valve plate, the valve seat is distributed in a circular ring inside the main body sleeve, one end of the one-way valve plate is connected to the valve seat ear axis, and the other end of the one-way valve plate is provided with a seal, and the semicircular diameter of the seal is equal to the diameter of the connecting rod.

[0008] Preferably, the main body outer shell is provided with a liquid outlet, the liquid outlet is arranged below the pressure cap, and the valve seat is arranged below the liquid outlet.

[0009] Preferably, the adjusting baffle pin is connected to a damping spring, and the other end of the damping spring is connected to the inside of the top end of the pressure cap.

[0010] Preferably, a regulating valve is provided at the liquid inlet, and the regulating valve includes a liquid inlet baffle, a side valve port and a lower valve port. The side valve port is provided above the liquid inlet baffle, and the lower valve port is provided in the center below the liquid inlet baffle. The regulating part is provided in the regulating valve.

[0011] Preferably, a slide is provided on the main body outer shell, and the adjustment baffle is adapted to the contact portion of the slide.

[0012] Therefore, the present invention adopts the above-mentioned one-way flow control device for chemical flooding injection wells, which has the following beneficial effects:

[0013] 1. The utility model prevents the backflow of liquid by setting a one-way valve plate. When the fluid flows in from the inlet end, the one-way valve plate is pushed open to allow the fluid to pass through; when the fluid attempts to flow back from the outlet end, the one-way valve plate is tightly closed, thereby protecting other components in the system from damage caused by pressure backflow;

[0014] 2. The utility model realizes flow control by setting a regulating valve to meet the requirements of different oil layer permeability. The regulating valve can also stabilize the fluid pressure to a certain extent to prevent pressure fluctuations from causing damage to the chemical flooding injection well.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a one-way flow control device for a chemical flooding injection well according to the present invention;

[0017] Figure 2 This is a schematic diagram of a one-way valve plate of a one-way flow control device for a chemical flooding injection well according to the present invention.

[0018] Notes

[0019] 1. Adjusting rod; 2. Pressure cap; 3. Main body jacket; 4. Damping spring; 5. Slide; 6. Adjusting baffle; 7. Sealing ring; 8. Liquid outlet; 9. Valve seat; 10. One-way valve plate; 11. Ear shaft; 12. Connecting rod; 13. Liquid inlet; 14. Regulating valve; 15. Side valve port; 16. Adjusting part; 17. Gasket; 18. Liquid inlet baffle; 19. Lower valve port; 20. Seal. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model is further described below through the accompanying drawings and embodiments.

[0021] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0022] The specific connection methods of each part all adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0023] As the instruction manual Figure 1-2 As shown, the utility model provides a one-way flow control device for a chemical drive injection well, comprising an adjusting rod 1, a pressure cap 2 and a main body jacket 3. The pressure cap 2 and the main body jacket 3 are connected by threads, and the adjusting rod 1 extends into the pressure cap 2 and into the main body jacket 3. A sealing ring 7 is provided between the pressure cap 2 and the main body jacket 3 to prevent liquid from entering.

[0024] An adjustment baffle 6 is provided below the adjustment rod 1, and a connecting rod 12 is fixedly provided below the adjustment baffle 6. The connecting rod 12 is provided on one side of the adjustment baffle 6. A plurality of adjustment members 16 are connected below the connecting rod 12. The size and number of the adjustment members 16 can be changed according to needs. A slide 5 is provided on the main body jacket 3, and the contact area between the adjustment baffle 6 and the slide 5 is adapted.

[0025] A one-way valve is provided inside the main casing 3. The one-way valve includes a valve seat 9 and a one-way valve plate 10. The valve seat 9 is distributed in a circular shape inside the main casing 3. One end of the valve seat 9 is in contact with the adjusting rod 1, and one end of the one-way valve plate 10 is connected to the valve seat 9 through an ear shaft 11. The other end of the one-way valve plate 10 is provided with a seal 20. The semicircular diameter of the seal 20 is equal to the diameter of the connecting rod 12. Therefore, when the one-way valve plate 10 is closed, the seal 20 fits against the adjusting rod 1, and the other end overlaps the valve seat 9, so that the liquid above and below the main casing 3 does not circulate. When the fluid flows in from the inlet end, the one-way valve plate 10 is pushed open, allowing the fluid to pass through; when the fluid tries to flow back from the outlet end, the one-way valve plate 10 is tightly closed, thereby protecting other components in the system from damage by pressure backflow.

[0026] The main body outer shell 3 is provided with a liquid outlet 8 , which is arranged below the pressure cap 2 , and the valve seat 9 is arranged below the liquid outlet 8 .

[0027] The pin of the regulating baffle 6 is connected to a damping spring 4 , and the other end of the damping spring 4 is connected to the top inner portion of the pressure cap 2 to reduce the pressure impact of the circulating liquid on the regulating baffle 6 .

[0028] A liquid inlet 13 is threadedly connected to the lower portion of the main housing 3. A gasket 17 is disposed between the main housing 3 and the liquid inlet 13. A regulating valve 14 is installed at the liquid inlet 13. This regulating valve 14 comprises an inlet baffle 18, a side valve port 15, and a lower valve port 19. The side valve port 15 is located above the inlet baffle 18, and the lower valve port 19 is located below and in the center of the inlet baffle 18. An adjusting member 16 is disposed within the regulating valve 14 to control the incoming liquid flow rate.

[0029] Therefore, the utility model adopts a one-way flow control device for chemical flooding injection wells with the above structure, which solves the problem of ground environmental pollution accidents, corrosion and blockage of downhole equipment caused by the backflow of formation liquid into the wellbore.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A one-way flow control device for a chemical flooding injection well, characterized by: It includes an adjusting rod, a pressure cap and a main body jacket. The pressure cap is connected to the main body jacket through a thread. The adjusting rod extends into the pressure cap and enters the main body jacket. An adjusting baffle is provided below the adjusting rod. A connecting rod is fixedly provided below the adjusting baffle. Several adjusting parts are connected below the connecting rod. A one-way valve is provided in the main body jacket. A liquid inlet is threadedly connected below the main body jacket.

2. A one-way flow control device for chemical flooding injection wells according to claim 1, characterized in that: A sealing ring is provided between the pressure cap and the main body outer shell, and a gasket is provided between the main body outer shell and the liquid inlet.

3. The one-way flow control device for chemical flooding injection wells according to claim 1, characterized in that: The one-way valve includes a valve seat and a one-way valve plate. The valve seat is distributed in a circular ring inside the main body sleeve. One end of the one-way valve plate is connected to the valve seat ear axis. The other end of the one-way valve plate is provided with a seal. The semicircular diameter of the seal is equal to the diameter of the connecting rod.

4. A one-way flow control device for chemical flooding injection wells according to claim 3, characterized in that: The main body outer shell is provided with a liquid outlet, the liquid outlet is arranged below the pressure cap, and the valve seat is arranged below the liquid outlet.

5. The one-way flow control device for chemical flooding injection wells according to claim 1, characterized in that: The adjusting baffle pin is connected with a damping spring, and the other end of the damping spring is connected to the inside of the top end of the pressure cap.

6. The one-way flow control device for chemical flooding injection wells according to claim 1, characterized in that: A regulating valve is provided at the liquid inlet, and the regulating valve includes a liquid inlet baffle, a side valve port and a lower valve port. The side valve port is provided above the liquid inlet baffle, and the lower valve port is provided in the center below the liquid inlet baffle. The regulating member is provided in the regulating valve.

7. The one-way flow control device for chemical flooding injection wells according to claim 1, characterized in that: A slideway is provided on the main body outer shell, and the adjustment baffle is adapted to the contact portion of the slideway.

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